Compilare: user.cpp: In function ‘int main()’: user.cpp:2:375: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] int t,a,b,p;inline int rec(int b,int p){if(p<=1) return 0;if(b==1)return a%p;int phi=p,aux=p;for(int i=2;i*i<=p;++i) if(p%i==0){while(p%i==0) p=p/i;phi=phi/i*(i-1);}if(p!=1)phi=phi/p*(p-1);int exp=rec(b-1,phi);int put=1;p=aux;aux=a%p;for(int i=0;(1<<i)<=exp;++i){if((1<<i)&exp)put=(1LL*put*aux)%p;aux=(1LL*aux*aux)%p;}return put;}int main(){freopen("ackermann.in","r",stdin);freopen("ackermann.out","w",stdout);scanf("%d",&t);while(t--)scanf("%d%d%d",&a,&b,&p),printf("%d\n",rec(b,p));return 0;} ^ user.cpp:2:411: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] int t,a,b,p;inline int rec(int b,int p){if(p<=1) return 0;if(b==1)return a%p;int phi=p,aux=p;for(int i=2;i*i<=p;++i) if(p%i==0){while(p%i==0) p=p/i;phi=phi/i*(i-1);}if(p!=1)phi=phi/p*(p-1);int exp=rec(b-1,phi);int put=1;p=aux;aux=a%p;for(int i=0;(1<<i)<=exp;++i){if((1<<i)&exp)put=(1LL*put*aux)%p;aux=(1LL*aux*aux)%p;}return put;}int main(){freopen("ackermann.in","r",stdin);freopen("ackermann.out","w",stdout);scanf("%d",&t);while(t--)scanf("%d%d%d",&a,&b,&p),printf("%d\n",rec(b,p));return 0;} ^ user.cpp:2:426: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int t,a,b,p;inline int rec(int b,int p){if(p<=1) return 0;if(b==1)return a%p;int phi=p,aux=p;for(int i=2;i*i<=p;++i) if(p%i==0){while(p%i==0) p=p/i;phi=phi/i*(i-1);}if(p!=1)phi=phi/p*(p-1);int exp=rec(b-1,phi);int put=1;p=aux;aux=a%p;for(int i=0;(1<<i)<=exp;++i){if((1<<i)&exp)put=(1LL*put*aux)%p;aux=(1LL*aux*aux)%p;}return put;}int main(){freopen("ackermann.in","r",stdin);freopen("ackermann.out","w",stdout);scanf("%d",&t);while(t--)scanf("%d%d%d",&a,&b,&p),printf("%d\n",rec(b,p));return 0;} ^ user.cpp:2:485: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int t,a,b,p;inline int rec(int b,int p){if(p<=1) return 0;if(b==1)return a%p;int phi=p,aux=p;for(int i=2;i*i<=p;++i) if(p%i==0){while(p%i==0) p=p/i;phi=phi/i*(i-1);}if(p!=1)phi=phi/p*(p-1);int exp=rec(b-1,phi);int put=1;p=aux;aux=a%p;for(int i=0;(1<<i)<=exp;++i){if((1<<i)&exp)put=(1LL*put*aux)%p;aux=(1LL*aux*aux)%p;}return put;}int main(){freopen("ackermann.in","r",stdin);freopen("ackermann.out","w",stdout);scanf("%d",&t);while(t--)scanf("%d%d%d",&a,&b,&p),printf("%d\n",rec(b,p));return 0;} ^